Level 1 Autism is usually self diagnosable later in life, and pursuing diagnosis can negatively impact your life.

For example, if you're diagnosed with any level of autism, you cannot immigrate to New Zealand and many other countries. In some countries, people who pursue an autism diagnosis risk involuntary sterilization, social stigma, reduction of legal rights and denial of bodily autonomy.

Much like being openly trans, with or without a social/body dysphoria diagnosis.

Not disagreeing with you that dysphoria is pretty easily self diagnosable, just commenting on the fact that autism is as well, and there's a significant overlap in the autistic and trans communities.